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Abandoned drugs
Cilansetron
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Cilansetron

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Cilansetron
Cilansetron.svg
Clinical data
Other names Calmactin; KC 9946
Pregnancy
category
  • C
Routes of
administration		 Oral
ATC code
Legal status
Legal status
  • Unlicensed
Pharmacokinetic data
Bioavailability 87%
Metabolism Hepatic
Elimination half-life 1.6 - 1.9 hours
Excretion Renal
Identifiers
  • (10R)-10-[(2-Methyl-1H-imidazol-1-yl)methyl]-5,6,9,10-tetrahydro-4H-pyrido(3,2,1-jk)carbazol-11-one
CAS Number
PubChem CID
IUPHAR/BPS
ChemSpider
UNII
KEGG
ChEMBL
CompTox Dashboard (EPA)
Chemical and physical data
Formula C20H21N3O
Molar mass 319.408 g·mol−1
3D model (JSmol)
  • O=C3c2c1cccc5c1n(c2CC[C@@H]3Cn4ccnc4C)CCC5
  • InChI=1S/C20H21N3O/c1-13-21-9-11-22(13)12-15-7-8-17-18(20(15)24)16-6-2-4-14-5-3-10-23(17)19(14)16/h2,4,6,9,11,15H,3,5,7-8,10,12H2,1H3/t15-/m1/s1 checkY
  • Key:NCNFDKWULDWJDS-OAHLLOKOSA-N checkY
  (verify)

Cilansetron is an experimental drug that is a 5-HT3 antagonist under development by Solvay Pharmaceuticals.

5-HT3 receptors are responsible for causing many things from nausea to excess bowel movements. In conditions such as irritable bowel syndrome (IBS), the receptors have become faulty or oversensitive. 5-HT3 antagonists work by blocking the nervous and chemical signals from reaching these receptors.

Studies have shown that the drug can improve quality of life in men and women with diarrhea-predominant IBS. Cilansetron is the first 5-HT antagonist specifically designed for IBS that is effective in men as well as women.

In 2005, Solvay received response from the U.S. Food and Drug Administration that cilansertron is not approvable without additional clinical trials; further development has been discontinued.


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